Improvement in concrete for paving and roofing



EDWARITDUEMPELMAN, OFhNEW YORK. N. Y.

Letters Patent No. 109,124, dated November. 29, 1870;

,IMPROVQEMENT INCONCRETE FOR PAVING ANn R ooFme.

The Schedule referred to 1;; these Letters-Patent andmaking part of the same.

To (HZ whom 'it may concern.- Y

Be it known that I, EDWARD DUEMPELMAN, of the city, county, and State of New York, have inreuted a new and improved Concrete for Paving, Roofing, and other purposes; which consists in treating either vegetable or animal oils with chloride of sulphur in proportions of one part of chloride to nine parts of oil. Ghlorohydric-acid is setfree, and au elastic material of the nature of caoutchouc is the result.

Pure asphaltnm is then melted, and the material prepared as above is added to it in such proportions as the quality of the asphaltum used may require to give itthe proper elasticity and consistency.

\Vhile the mass is yet in a fluid state I stir in a quantity of such substances of an absorbent nature as will be suificient to absorb the fluid particles of the mass and produce a thorough'absorption and adinix- What I claim as my invention, and desire tosecure by Letters Patent, is-' The process of sulphurizing, of on, by treatment with chloride of sulphur, in the proportions named, which is to be snbsequently added to pure asphaltum,

in the manner and for the purposes above described and set forth.

\Vitnesses: EDWARD DUEMPELMAN.

SEWALL SERGEANT, WILLIAM MELDRUM. 

